16. Patients with known hypersensitivity to anticholinergic drugs, any other component of the ipratropium bromide/albuterol RESPIMAT solution including Benzalkonium chloride (BAC) and Ethylenediaminetetraacetic acid (EDTA) or the ipratropium bromide/albuterol Chlorofluorocarbons (CFC) MDI or Hydrofluoroalkane (HFA) components.